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author | Dave Airlie <airlied@linux.ie> | 2010-02-01 15:38:10 +1000 |
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committer | Dave Airlie <airlied@redhat.com> | 2010-03-01 16:20:37 +1000 |
commit | 6a9ee8af344e3bd7dbd61e67037096cdf7f83289 (patch) | |
tree | 07cdb493a790cf45bc473f2fc2ea1b9a166d5191 /drivers/video/console | |
parent | 9fd1de52945e06ed88a440c99ca92dab74b9b33c (diff) | |
download | kernel_samsung_tuna-6a9ee8af344e3bd7dbd61e67037096cdf7f83289.zip kernel_samsung_tuna-6a9ee8af344e3bd7dbd61e67037096cdf7f83289.tar.gz kernel_samsung_tuna-6a9ee8af344e3bd7dbd61e67037096cdf7f83289.tar.bz2 |
vga_switcheroo: initial implementation (v15)
Many new laptops now come with 2 gpus, one to be used for low power
modes and one for gaming/on-ac applications. These GPUs are typically
wired to the laptop panel and VGA ports via a multiplexer unit which
is controlled via ACPI methods.
4 combinations of systems typically exist - with 2 ACPI methods.
Intel/ATI - Lenovo W500/T500 - use ATPX ACPI method
ATI/ATI - some ASUS - use ATPX ACPI Method
Intel/Nvidia - - use _DSM ACPI method
Nvidia/Nvidia - - use _DSM ACPI method.
TODO:
This patch adds support for the ATPX method and initial bits
for the _DSM methods that need to written by someone with
access to the hardware.
Add a proper non-debugfs interface - need to get some proper
testing first.
v2: add power up/down support for both devices
on W500 puts i915/radeon into D3 and cuts power to radeon.
v3: redo probing methods, no DMI list, drm devices call to
register with switcheroo, it tries to find an ATPX method on
any device and once there is two devices + ATPX it inits the
switcher.
v4: ATPX msg handling using buffers - should work on more machines
v5: rearchitect after more mjg59 discussion - move ATPX handling to
radeon driver.
v6: add file headers + initial nouveau bits (to be filled out).
v7: merge delayed switcher code.
v8: avoid suspend/resume of gpu that is off
v9: rearchitect - mjg59 is always right. - move all ATPX code to
radeon, should allow simpler DSM also proper ATRM handling
v10: add ATRM support for radeon BIOS, add mutex to lock vgasr_priv
v11: fix bug in resuming Intel for 2nd time.
v12: start fixing up nvidia code blindly.
v13: blindly guess at finishing nvidia code
v14: remove radeon audio hacks - fix up intel resume more like upstream
v15: clean up printks + remove unnecessary igd/dis pointers
mount debugfs
/sys/kernel/debug/vgaswitcheroo/switch - should exist if ATPX detected
+ 2 cards.
DIS - immediate change to discrete
IGD - immediate change to IGD
DDIS - delayed change to discrete
DIGD - delayed change to IGD
ON - turn on not in use
OFF - turn off not in use
Tested on W500 (Intel/ATI) and T500 (Intel/ATI)
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/video/console')
-rw-r--r-- | drivers/video/console/fbcon.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index 3681c6a..b0a3fa0 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -3025,6 +3025,20 @@ static int fbcon_fb_unregistered(struct fb_info *info) return 0; } +static void fbcon_remap_all(int idx) +{ + int i; + for (i = first_fb_vc; i <= last_fb_vc; i++) + set_con2fb_map(i, idx, 0); + + if (con_is_bound(&fb_con)) { + printk(KERN_INFO "fbcon: Remapping primary device, " + "fb%i, to tty %i-%i\n", idx, + first_fb_vc + 1, last_fb_vc + 1); + info_idx = idx; + } +} + #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY static void fbcon_select_primary(struct fb_info *info) { @@ -3225,6 +3239,10 @@ static int fbcon_event_notify(struct notifier_block *self, caps = event->data; fbcon_get_requirement(info, caps); break; + case FB_EVENT_REMAP_ALL_CONSOLE: + idx = info->node; + fbcon_remap_all(idx); + break; } done: return ret; |